package main

import "fmt"

func main() {
	yesNo := "1"
	var launch bool

	switch yesNo {
		case "true", "yes", "1":
			launch = true
		case "false", "no", "0":
			launch = false
		default:
			fmt.Println(yesNo, "is invalid") 
	}

	fmt.Println("Ready for launch:", launch)
}